Comparison of CT scanograms and cephalometric radiographs in craniofacial imaging

Abstract

Cephalograms and CT scanograms are close in depicting angular relations of structures, but they differ in the accuracy of imaging linear measurements, because the location and size of an object within the imaged 3D structure varies with both records. Logistic and economic considerations favor the use of cephalographs.

Evaluation of mandibular volume using cone-beam computed tomography and correlation with cephalometric values

“…Their main drawback is radiographic projection error, which can magnify or distort the geometric relationships displayed in the image. 22 Reliable and accurate evaluation is difficult because of this inherent geometric magnification, distortion, and superimposition of craniofacial structures. [23][24][25][26][27] The use of cephalometry as an adjunct to clinical examination as a basis for predicting craniofacial growth is thus questionable.…”

Validity and reproducibility of cephalometric measurements performed in full and hemifacial reconstructions derived from cone beam computed tomography

“…Therefore, the angular measurements are not influenced by the magnification minimizing the projection errors associated with head rotation on the vertical axis. [5][6][7][8]13,16 There are landmarks formed by two-dimensional representation of the patient's head (eg, mandibular symphysis, pterygomaxillary fossa, articulare, key ridge). 9 Nowadays, it is hard to know how the loss of information affects a cephalometric analysis.…”

“…Cone beam computed tomography (CBCT) was introduced to the dental community 10 years ago and was specifically developed for evaluation of the head and neck. 15,16 Cone beam technology has led to the development of a new generation of tomographic systems for the acquisition of volumetric images that, compared with multislice CT, has the following advantages: less cost, less dose of radiation, and better spatial resolution. [17][18][19] Software development [20][21][22] has allowed better manipulation of data on the computer.…”

The Effect of Type 1 Diabetes Mellitus on the Craniofacial Complex

“…6. Analytic studies conducted to test the effect of diabetic condition on craniofacial growth 6.1 Cephalometric analysis Cephalometric measurements are still one of the most widely spread diagnostic aids crucial for the diagnosis of various abnormalities in the craniofacial complex (Chidiac et al, 2002). The protocol for examining the cephalometric measurements in DM rats involves the following steps:  Prior to each radiographic session, the rats are anaesthetized with diethyl ether and intraperitoneal injection of 8% chloral hydrate using 0.5ml/100g of body weight.…”